Handle R1 contrast not being unique

Author: StephenNneji

ratapi/utils/convert.py

@@ -5,7 +5,7 @@
 from os import PathLike
 from pathlib import Path
 
-from numpy import array, empty
+from numpy import array, empty, ndarray
 from scipy.io.matlab import MatlabOpaque, loadmat
 
 from ratapi import Project, wrappers
@@ -227,6 +227,12 @@ def fix_invalid_constraints(name: str, constrs: tuple[float, float], value: floa
     if isinstance(mat_project["resolNames"], str):
         mat_project["resolNames"] = [mat_project["resolNames"]]
 
+    if isinstance(mat_project["contrastNames"], (ndarray, list)) and len(
+        dict.fromkeys(mat_project["contrastNames"])
+    ) != len(mat_project["contrastNames"]):
+        # contrast names are not unique so create unique ones
+        mat_project["contrastNames"] = [f"Contrast {i + 1}" for i in range(len(mat_project["contrastNames"]))]
+
     contrasts = ClassList(
         [
             Contrast(